uid=BNZ,o=lter,dc=ecoinformatics,dc=org all public read knb-lter-bnz.187.10 Isla Myers-Smith

405 CW Biological Sciences Building, Dept. Biological Sciences University of Alberta, , AB, T6G 2E9 Edmonton Aberta T6G 2E9 Canada

(780) 492-1295 myerssmi@ualberta.ca http://www.ualberta.ca/~myerssmi/home.html Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu F.S. Stuart Chapin Professor of Ecology

Department of Biology and Wildlife; Institute of Arctic Biology: University of Alaska Fairbanks 193 Arctic Health P.O. Box 757000 Fairbanks AK 99775 United States

(907) 474-7922 (907) 474-6967 Associated investigator Jennifer W. Harden USGS, Adjunct Professor of Soil Science, University of Alaska Fairbanks

U.S. Geological Survey 345 Middlefield Road, MS 962 Menlo Park CA 94025 United States

(650) 329-4949 (650) 329-4920 Associated investigator A. David McGuire Assistant Professor of Landscape Ecology

Alaska Cooperative Fish and Wildlife Research Unit University of Alaska Fairbanks Irving I Building Fairbanks AK 99775 United States

(907) 474-6242 (907) 474-7872 Associated investigator 2005-11-12 We used digital photographs to project the biomass over the growing season. This data set contains ground cover photos of plots from the center of the BBC collapse scar (0m) into the surrounding fire scar (30m) of the Survey Line Fire (burned in June-July 2001) for the growing seasons of 2003 and 2004. Also included are ground cover photos of plots along the biomass transect used to create the projected biomass data. We calculated the percent cover of vegetation for the biomass and intensively monitored transects from digital photographs. Photographs were rectified to 10,000 x 10,000 pixels and a 20 x 20 grid was applied to the photograph. The percentage of each plant type was estimated in each grid cell. The percent cover was regressed against the measured dry biomass to project biomass for the intensively measured transect. We did not project moss biomass and instead assumed it to be the same for both transects. We projected the change in biomass over the growing season from the change in greenness determined from digital photographs. We chose five dates throughout the growing season with pictures of equal color saturation, focus and aspect. From these we estimated the percent photosynthetic biomass by selecting areas of green on the photograph and calculating the percentage of the total pixels made up by these areas. We estimated curves for the change in % green vegetation for 0, 6 m and the mean of the remaining distances along the transect (12, 18, 24, and 30 m), as these regions of the transect exhibited different patterns of greenness across the growing season of 2004. To estimate photosynthetic biomass over the growing season, we corrected the biomass estimates for the study transect to account for the change in green vegetation associated with growth and senescence biomass ground cover Biogeochemistry

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http://www.lter.uaf.edu/data_detail.cfm?datafile_pkey=187 Site information unavailable -148.3334833 -148.3334833 64.6408 64.6408 2003-08-06 2004-09-18

Completed

Bonanza Creek LTER Data Manager

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 jpdowning@alaska.edu http://www.lter.uaf.edu Bonanza Creek LTER

Boreal Ecology Cooperative Research Unit University of Alaska Fairbanks P.O. Box 756780 Fairbanks AK 99775 USA

907-474-6364 907-474-6251 Bonanza Creek LTER

We used digital photographs to project the biomass over the growing season.

Pictures were taken on the east and west side of every point along the transect (0, 6, 12, 18, 24, and 30 m) at every visit to the site at the intensively monitored transect and once before harvest at the biomass transect.

geoReference 2003-08-06 2004-09-18

bi-weekly

biomass_photos.zip biomass_photos.zip 1 \n \n column \t http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-bnz..&urlTail=/ascii/files/biomass_photos.zip DOY DOY Day of year of measurement integer DOY -9999 Missing Value Distance Distance Distance along the transect (0-30m) float Distance along the transect (0-30m) -9999 Missing Value Side of Transect Side of Transect Side of the transect (East or West) string Side of the transect (East or West) -9999 Missing Value Projected Total Biomass (g/m2) Projected Total Biomass (g/m2) Total plant biomass projected using the vegetation greeness determined from digital photos and biomass projections for distances along the transect that was not destructively harvested (in g per m2) float gramsPerSquareMeter real -9999 Missing Value biomass_projection_data.txt biomass_projection_data.txt 1 \n \n column \t http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-bnz..&urlTail=/ascii/files/biomass_photos.zip DOY DOY Day of year of measurement integer DOY -9999 Missing Value Distance Distance Distance along the transect (0-30m) float Distance along the transect (0-30m) -9999 Missing Value Side of Transect Side of Transect Side of the transect (East or West) string Side of the transect (East or West) -9999 Missing Value Projected Total Biomass (g/m2) Projected Total Biomass (g/m2) Total plant biomass projected using the vegetation greeness determined from digital photos and biomass projections for distances along the transect that was not destructively harvested (in g per m2) float gramsPerSquareMeter real -9999 Missing Value